The breathable and water resistant 10cm (4 inches) thick Super fibre safety mattress is made from environmentally friendly and fully recyclable fibre material which offers superb comfort and support for your baby. Unlike Foam, which is still being used in the manufacture of Baby Cot Mattresses, this one piece high density pad will not discolour and is non allergenic. The hygienic thermally bonded 'Nursery Grade' cover is breathable and water resistant and offers protection against dust mites. The cover is zipped to be fully removable for washing purposes. The mattress is suitable for placing your baby in the 'feet to foot' position.